[dawnerd]

I would love it if browsers detected spikes in cpu usage and ask if you want to end the script, similar to when a page stops responding/locks up.

[cimmanom]

Firefox does do that.

[Nursie]

AFAICT firefox does that when it starts causing problems for the page, and causing unresponsiveness, but not just for processor spikes.

[dawnerd]

Hmmm haven't noticed it but I don't use it too much, just for testing. Might have to switch for a while to see if I like it.